5H15.10 • Magnetic Fields: Iron Filings Around a Wire

Location: On Table by Cabinet 3

Photo Shows the Demo Apparatus Used by the University of Texas at Austin.

Instructions / Notes:

• Demonstration includes a wire loop with a clear platform and a high amperage power supply, (shown above).
• Blue paper was inserted under the clear platform for photographic purposes.
• Sprinkle iron filings on the removable plexiglass disc.
• Switch on the power supply
• Repeatedly tap the plexiglass disc on its underside to encourage alignment.
• Turn-off power supply and place the plexiglass disc on an overhead projector - or - document camera.

Photo Shows the Demo Apparatus Used by the University of Texas at Austin.

Drawing is by Courtesy of the University of Minnesota.

Last updated on June 8, 2026